1 .\" Copyright (c) 1980, 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 4. Neither the name of the University nor the names of its contributors
13 .\" may be used to endorse or promote products derived from this software
14 .\" without specific prior written permission.
16 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 .\" @(#)mknod.2 8.1 (Berkeley) 6/4/93
29 .\" $FreeBSD: src/lib/libc/sys/mknod.2,v 1.18 2008/04/16 13:03:12 kib Exp $
37 .Nd make a special file node
43 .Fn mknod "const char *path" "mode_t mode" "dev_t dev"
45 .Fn mknodat "int fd" "const char *path" "mode_t mode" "dev_t dev"
49 is created with the file type and access permissions specified in
51 The access permissions are modified by the process's umask value.
55 indicates a block or character special file,
57 is a configuration dependent specification denoting a particular device
66 requires super-user privileges.
70 system call is equivalent to
72 except in the case where
74 specifies a relative path.
75 In this case the newly created device node is created relative to the
76 directory associated with the file descriptor
78 instead of the current working directory.
81 is passed the special value
85 parameter, the current working directory is used and the behavior is
86 identical to a call to
94 will fail and the file will be not created if:
97 A component of the path prefix is not a directory.
98 .It Bq Er ENAMETOOLONG
99 A component of a pathname exceeded 255 characters,
100 or an entire path name exceeded 1023 characters.
102 A component of the path prefix does not exist.
104 Search permission is denied for a component of the path prefix.
106 Too many symbolic links were encountered in translating the pathname.
108 The process's effective user ID is not super-user.
110 An I/O error occurred while making the directory entry or allocating the inode.
112 The directory in which the entry for the new node is being placed
113 cannot be extended because there is no space left on the file
114 system containing the directory.
116 There are no free inodes on the file system on which the
117 node is being created.
119 The directory in which the entry for the new node
120 is being placed cannot be extended because the
121 user's quota of disk blocks on the file system
122 containing the directory has been exhausted.
124 The user's quota of inodes on the file system on
125 which the node is being created has been exhausted.
127 The named file resides on a read-only file system.
129 The named file exists.
134 points outside the process's allocated address space.
136 Creating anything else than a block or character special
142 In addition to the errors returned by the
151 argument does not specify an absolute path and the
155 nor a valid file descriptor open for searching.
159 argument is not an absolute path and
163 nor a file descriptor associated with a directory.
173 system call follows The Open Group Extended API Set 2 specification.
181 system call appeared in